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The promotion effect of CeOx on Cu-SAPO-34 catalyst for selective catalytic reduction of NOx with ammonia

Paper ID Volume ID Publish Year Pages File Format Full-Text
53881 46988 2015 7 PDF Available
Title
The promotion effect of CeOx on Cu-SAPO-34 catalyst for selective catalytic reduction of NOx with ammonia
Abstract

•The effect of CeOx on the NH3-SCR activity of the Cu-SAPO-34 is investigated.•The introduction of CeOx improves the SCR activity in high temperature range.•The addition of CeOx suppresses the NO and NH3 oxidation activity.•The addition of CeOx decreases the amount of isolated Cu2+.

An incipient wetness impregnation method is employed to incorporate CeOx into a Cu-SAPO-34 catalyst prepared with a two-step ion exchange method. The addition of CeOx improves the NOx selective catalytic reduction (SCR) activity of the catalyst, and suppresses the nonselective side reactions, such as the NO oxidation and NH3 oxidation reactions in high temperature range of the catalyst. The temperature programmed reduction with H2 and the electron paramagnetic resonance results reveal that the addition of CeOx decreases the amount of the isolated Cu2+ species, which contributes to the decreases of the NO and NH3 oxidation activities of the catalyst in high temperature range and its SCR activity in low temperature range.

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Keywords
NH3-SCR; NOx conversion; Cu-SAPO-34 catalyst; CeOx modification; NO oxidation; NH3 oxidation
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The promotion effect of CeOx on Cu-SAPO-34 catalyst for selective catalytic reduction of NOx with ammonia
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 258, Part 1, 1 December 2015, Pages 28–34
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us